FIrst Build-Need Clarifications and Suggestions PLEASE! THANK YOU!!!

Alright, so I bought a cheap gaming PC from Gateway (first mistake lol) with the intention of upgrading it afterwards (don't want to build a pc from ground up right away b/c want to get fundamentals down first), but I didn't think the case would be so small (only accepts micro atx motherboards). Since I want to overclock the CPU (Intel Q9300 - 2.5ghz) and make sure it doesn't blow up or something, I need better cpu cooling than what is provided.
Also....

This was the PC I ordered:
http://www.compusa.com/applications/SearchTools/item-details.asp?EdpNo=4238269&csid=ITD&body=MAIN#detailspecs
More PC specs:
http://support.gateway.com/s/PC/FX/1015750R/1015750Rcl2.shtml

This is nearly identical to the CPU cooling I have now:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103051

This is my new CPU cooler:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835233014

This is the new thermal grease and solution:
http://www.amazon.com/Arctic-Silver-Compound-3-5grams-ArctiClean/dp/B001FVI91U/ref=pd_cp_e_2?pf_rd_p=413863501&pf_rd_s=center-41&pf_rd_t=201&pf_rd_i=B0002EQU6C&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1E4R0XGRZNXP1NG71XXG

This is my old mobo:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813186123
and here are some more specs:
http://support.gateway.com/s/MOTHERBD/Intel2/4006259R/4006259Rsp2.shtml

This is the mobo I have now:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131336

This is the graphics card I have now (old one was a factory OC 9800 GT):
http://www.buy.com/prod/evga-geforce-gtx-260-ssc-896mb-448-bit-pci-e-sli-supported-video-card/q/loc/101/208342564.html

Old PSU was a 400W Delta DPS-400RB A:
http://support.gateway.com/s/POWER/6501066/6501066tc.shtml

This is my new PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341002

Old memory was Hynix 4GB 667 MHZ

This is my new memory:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227267
(shoot, it got cheaper lol)

With these components all I can really do is OC my CPU to 3.0 ghz max [since the max FSB the mobo supports is 1600, to get my intel CPU FSB to 1600, which is currently at 1333, I have to OC the non-quad pumped FSB (whatever that's termed) to 400 mhz to obtain a cpu speed of 3.0 ghz (core multiplier is locked at 7.5x)]

I know the GTX 260 should fit in my computer tower, though I'll have to move some components around (like the hard drive).

I want to OC the CPU and Graphics Card....any suggestions beyond the CPU OC I thought of?

Throwing it out there--also, is it possible to OC the supported FSB of the mobo...it's at 1600 mhz right now?

AM I DOING THIS WRONGLY?!
HELP IS GREATLY APPRECIATED AND SUGGESTIONS VERY WELCOME!!!!!
5 answers Last reply
More about first build need clarifications suggestions please
  1. Do you know what Chipset your Running?
  2. G45....whoops, looks like I have to post new links
  3. G45....whoops, looks like I have to post new links
  4. My concern is the size of the case. Mini-tower could mean a mini PSU and like you said room for the GPU
  5. The PSU in it right now is an ATX PSU, so I think the OCZ should also be the same size if it's ATX, right?
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