I just found a patch that are extremely useful for our B7610..
All must install it. It will solve the problem below. Tested with my B7610. I can open more than 6 apps now including Garmin..

Some devices, especially the new 2009 Omnia series from Samsung do not have a lot of memory available. Some of these are also configured to use rather aggressive memory management. The result is that you can hardly start any amount of applications (3 or 4, usually) before the system starts to shut down already running applications, while half or more of the available physical memory is not being used at all.

http://forum.xda-developers.com/showthread.php?t=637771

Enjoy!

Another tips to reduce RAM

There is also this fantastic tip from always the same guy daskalos: save up more RAM for those who are using WM 6.5

Look at post #8

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Added on January 2, 2011, 6:02 pmanyone know what .csc version best suit our b7610? and what is the original .csc and pda version? thanks in advances.

This post has been edited by whyhon: Jan 2 2011, 06:02 PM