Upgrading an old mac mini intel 1.1 for Lion I'm looking to buy an older mac mini (v1.1) CoreDuo 1.66Ghz 2Gb DDR2, 80Gb HD.

My research shows the original OS was Mac OS X 10.4.11.

So my question is: if i will upgrade my CPU from T2300 to T7200 (2.0Ghz,Core2Duo) and the FirmWare from 1.1 to 2.1 so I can increase the ram from 2 to 4 Gb.

Will this configuration work for lion (Yes, i know 1.1 is not compatible with installer)?

I mean installed lion 10.7.5 will work good like now works Tiger and other soft like ilife 09, ableton 8, reason 5, audacity? or it will lagging?

also i need lion for my wifi adapter TP-LINK TL-WN7722N (i think i can startup this adapter with atheros fix or other kexts)
Short answer: No, it will not work. 

Long answer: Lion requires a 64bit processor and the Yonah processor on the mini1,1 still is partially 32 bit. You will NOT be able to boot in to Lion because you cannot boot a 64 bit kernel. However, it is possible to use a separate disk to boot into a custom boot loader and then load Lion from there (much like trying to get a MacPro1,1 to boot Lion). This is a definite hack, and not something I would recommend to anyone, especially for a super-low-end machine like this mini. It will not be happy.

Also, this machine has a SATA-I interface, so even with an SSD in it, it will still be slow.