Hi, today I just bought a Clarion 845 which is on sale in a local store, since the guys in store didn't think there is a way to install them without losing the MFSW function, think I may go install it myself. So, if I do want to install it myself, what components I need in order to make it work? I found from Crutchfield that I need the followings, are these all ?

PAC SWI-X Steering Wheel Radio Control Interface
Euro Antenna Adapter OEM M to Motorola F
Volkswagen Wire Harness
Mini-Cooper 2002-Up Kit/S/E

Also, any one already have experience installing 845 alone or 845 + SWI-X yourself? Any How-To or DIY instruction to share? Easy? I don't want to lose the MFSW functions, so if I cannot find it is easy to install, or not possible to install, I may return the unit next week, since I will be out of town the following three weeks, meaning I cannot return it within 30 days after I came back, so have to return by next week.

Thanks much in advance.