SO I've tried almost every trick there is to get the memory bug out of LCPDFR with steam and had no luck.  until I tried this combo.  

 

Im using a 4GB gtx 460 card with this setting.   Use the number with how many gig video mem you have.

 

I was able to play for 2 hours with no crash and no memory leak with all high poly modded cars.  The eventual problem came with the stop spike script not LCPDFR

 

here's my code that has worked the best

 

Go into properties and launch options, copy and paste

 

-availablevidmem 4.0 -norestrictions

 

 

using nomem restrictions didnt work for me, it just maxed out until it crashed.  But for some reason these two together make it more stable then I've ever experienced. Hope this helps someone 

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I'll try it out, thanks.

Nice

Yes, this is the method I used to get my game to run at all. But it doesn't make it crash less.

Personally I'm lauching GTA through the .exe and not through Steam (even though I do play with the Steam version), because all those tricks never worked for me.

You have to run the Steam EXE as admin and set everything to LOW with modded cars.  Each time a 4MB+ car spawns, the graphic memory gets sapped up.   Its also good to check your hard drive paging file for what folder GTAIV is installed on.  If there isn't more than 2 GB virtual memory, GTAIv will start eating into main memory and cause a crash.  

 

I was getting full blue screen crashes until I changed the paging file and cleaned up my hard drive