Inspiron 5100 wireless mini-pci card; 2.4 or 5 mhz differences?

[LeftCoast]

Hi all,

I just found out that this was an available option for my 5100, but it's a little confusing. What mini pci cards would you all suggest (I'm assuming they work on most wireless router/access points).

Also, in the Dell literature, it states that, by law, only a qualified tech can install a 5 mhz card, but you can install your own 2.4 mini pci card. What's up with that?

Thanks in advance, and GO BOLTS!