seriously - get 7zip ! Rar is good but 7z is easier to use
but here you go
double click on a .RAR file to open it
click on the files you want to extract and drag to where ever you want them putting
ie Desktop or a Temp folder
ISO's simple method
Right mouse on the ISO and select the WinRar icon : Extract Files...
Tell it where you want the files and click OK
PS2 x3 (Phat) - Network Adapters x2
160gig (153gig) Internal HDD (Seagate ST3160022A)
164gig (157gig) Internal HDD (Hitachi Deskstar HDT722516DLAT80)
(Hitachi Deskstar HDS724040KLAT80) Dead
FreeMCBoot - OPL 0.8 + HDL0.8c Game Compatibility Checker. WinHIIP User!
Latest MAME Roms : Rom-Connection.caDesigned & (C)2013 by ZX81v2
MY PS2 OPL 0.8 HDD Game Compatibility List http://adf.ly/YeOOF