Why not use the 4 leads to wire stereo audio from an amplifier to each room? you could replace the wall plates with speaker jack wall plates and have audio throughout your house. If the gauge is too small for amplified audio (not sure if telephone wire is normally 24ga, 22ga, 20ga or 18ga) you could send line level to RCA jacks and use small amplifiers in each room, or amplified speakers. Plus if you sold your home, you could always put the phone jacks back on the walls, not to mention install the same setup in your next home. This IMHO would be awesome for entertaining guests.

Why not use the 70-290, 70-291 70-293 and 70-294 MCSE / MCSA Certication Exam Microsoft Press books? They cover some basic Windows Server administration, subnetting, active directory, security and VPNs all in a palatable way that they will likely actually see in the real world. I was suprised, I went back and got My MCSE/MCSA after being in the field for several years and I actually found some of the information quite useful.