I've started on Procul Harum's
Whiter Shade of Pale, as arranged by Martin Tallstrom. 6 pages of transcription, I'm only on page one and not likely to have much time with it this weekend.
Martin has a few of his tabs posted for free on
http://www.tallstrom.com/ under the link "free tabs". This is one of 'em.
Probably about 2-3 weeks to learn, I reckon. I'm kinda slow with it. Ulli Boegershausen's arrangement of "
Wonderful Tonight took me over a month, and I'm still trying to smooth out a couple of sections.