Im running 3 wu's on my 460 1gb and 2 on 460 768mb cards.
Im running this
<app_info>
<app>
<name>einstein_S5GC1HF</name>
<user_friendly_name>Global Correlations S5 HF search #1</user_friendly_name>
</app>
<app>
<name>einsteinbinary_BRP3</name>
<user_friendly_name>Binary Radio Pulsar Search</user_friendly_name>
</app>
<file_info>
<name>einstein_S5GC1HF_3.06_windows_intelx86__S5GCESSE2.exe</name>
<main_program/>
</file_info>
<file_info>
<name>einstein_S5R6_3.01_graphics_windows_intelx86.exe</name>
<executable/>
</file_info>
<file_info>
<name>cufft32_23.dll</name>
<executable/>
</file_info>
<file_info>
<name>cudart32_23.dll</name>
<executable/>
</file_info>
<file_info>
<name>einsteinbinary_BRP3_1.04_windows_intelx86__BRP3cuda32.exe</name>
<executable/>
</file_info>
<file_info>
<name>einsteinbinary_BRP3_1.05_windows_intelx86__BRP3cuda32.exe</name>
<executable/>
</file_info>
<file_info>
<name>einsteinbinary_BRP3_1.00_graphics_windows_intelx86.exe</name>
<executable/>
</file_info>
<file_info>
<name>cudart_xp32_32_16.dll</name>
<executable/>
</file_info>
<file_info>
<name>cufft_xp32_32_16.dll</name>
<executable/>
</file_info>
<file_info>
<name>db.dev.win.4330b3e5</name>
</file_info>
<file_info>
<name>dbhs.dev.win.4330b3e5</name>
</file_info>
<file_info>
<name>db.dev.win.96b133b1</name>
</file_info>
<file_info>
<name>dbhs.dev.win.96b133b1</name>
</file_info>
<app_version>
<app_name>einsteinbinary_BRP3</app_name>
<version_num>104</version_num>
<platform>windows_intelx86</platform>
<avg_ncpus>0.200000</avg_ncpus>
<max_ncpus>1.000000</max_ncpus>
<plan_class>BRP3cuda32</plan_class>
<api_version>6.13.0</api_version>
<file_ref>
<file_name>einsteinbinary_BRP3_1.04_windows_intelx86__BRP3cuda32.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>cudart_xp32_32_16.dll</file_name>
<open_name>cudart32_32_16.dll</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>cufft_xp32_32_16.dll</file_name>
<open_name>cufft32_32_16.dll</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>einsteinbinary_BRP3_1.00_graphics_windows_intelx86.exe</file_name>
<open_name>graphics_app</open_name>
</file_ref>
<file_ref>
<file_name>db.dev.win.4330b3e5</file_name>
<open_name>db.dev</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>dbhs.dev.win.4330b3e5</file_name>
<open_name>dbhs.dev</open_name>
<copy_file/>
</file_ref>
<coproc>
<type>CUDA</type>
<count>0.330000</count>
</coproc>
<gpu_ram>220200960.000000</gpu_ram>
</app_version>
<app_version>
<app_name>einsteinbinary_BRP3</app_name>
<version_num>105</version_num>
<platform>windows_intelx86</platform>
<avg_ncpus>0.200000</avg_ncpus>
<max_ncpus>1.000000</max_ncpus>
<plan_class>BRP3cuda32</plan_class>
<api_version>6.13.0</api_version>
<file_ref>
<file_name>einsteinbinary_BRP3_1.05_windows_intelx86__BRP3cuda32.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>cudart_xp32_32_16.dll</file_name>
<open_name>cudart32_32_16.dll</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>cufft_xp32_32_16.dll</file_name>
<open_name>cufft32_32_16.dll</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>einsteinbinary_BRP3_1.00_graphics_windows_intelx86.exe</file_name>
<open_name>graphics_app</open_name>
</file_ref>
<file_ref>
<file_name>db.dev.win.96b133b1</file_name>
<open_name>db.dev</open_name>
<copy_file/>
</file_ref>
<file_ref>
<file_name>dbhs.dev.win.96b133b1</file_name>
<open_name>dbhs.dev</open_name>
<copy_file/>
</file_ref>
<coproc>
<type>CUDA</type>
<count>0.330000</count>
</coproc>
<gpu_ram>220200960.000000</gpu_ram>
</app_version>
<app_version>
<app_name>einstein_S5GC1HF</app_name>
<version_num>306</version_num>
<platform>windows_intelx86</platform>
<plan_class>S5GCESSE2</plan_class>
<api_version>6.13.0</api_version>
<file_ref>
<file_name>einstein_S5GC1HF_3.06_windows_intelx86__S5GCESSE2.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>einstein_S5R6_3.01_graphics_windows_intelx86.exe</file_name>
<open_name>graphics_app</open_name>
</file_ref>
</app_version>
</app_info>
this gives 3wu's if you want only two change the 0.330000 to 0.500000 (two places) save it as app_info.xml
Also look at
http://einstein.phys.uwm.edu/forum_thread.php?id=8652#110430