This is caused by you running out of system memory.
your 32bit OS cant handle all those mods.
1st try the 3 gig patch :-
Quote:
If you are using a 32bit operating system - adding mods can push your machine over its memory limits and cause CTD. You can take some steps to reduce this happening. This is done by following this guide to enable a 3gig switch that will allow your system to give itself more memory.
3gig switch info
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or remove some of the mods that use lots of mem