Sheriff Van Dyck

Hi to all. I have a very annoying problem and hope you can help me. I have GTA 1.0.7.0 and LCPDFR RC2-R2, and have modded cars too (vehicles.img=120Mb, not a big deal). So, with modded cars we need to fix some things in the traffic, so i've tried with every kind of traffic fixes and commandlines, but i always get the same problem: missing textures. Officers, this is very very annoying, i just can't play in any way because of that bug, even none of the cars that i've added are bigger than 3mb and even on the lowest settings, i have a high-end pc, i give it a clean every week inside and outside and inside the software, got drivers on date every time, i don't have any kind of weird programs at all, and i see on youtube videos and in some pictures around here that people have the same game as me, with more or less heavy modded vehicles and also LCPDFR, but all i can see is that they can play normally, without problem. So please please please, help me on this one by telling me what can i do, its getting me very sad that i can't play with happiness my favourite game being a cop that is my biggest dream :( PD I can actually play any other game without problems (very good) like Mafia II, CoD MW3, BF3, etc, and here you got my PC specs: Motherboard: Gigabyte GA-870A-USB3 Processor AMD Phenom II X3 720 Black Edition @2.80Ghz (No O.C) OS Windows 7 Ultimate 32bits 4GB DDR3 Corsair (I cant see very well but i guess it says 1333 or 1666mhz or something) Nvidia ZOTAC GeForce GTS 450 iGB 128BIT DDR5 HDD Seagate 500Gb Pixxo Jaguar 600watts 1x fan Gigabyte piano style Case with 2x cooler fans

So, whats up guys? You see, i'm new at th GTA IV Multiplayer, (not in the game, in wich i got a lot of time) I see this MP in IV is way too different from SAMP..So, can somebody please tell me how do i join a server? How can i play with other people? i.e. If i want to join a role play server, playing a cop or lcpdfr, how can i do that? Thanks a lot you guys, cheers.