.....go and spend some money in a motorcycle shop.....
Genghis, I now have a somewhat revised mental image of the average Microlight pilot:
"It's fun to fly with the Bee Emm Ay Ay.....!!"
Seriously though:
1. You may fly a Microlight on a JAR-FCL PPL SEP Class Rating after having received 'differences training' from a Microlight instructor, but you do not need any new Class Rating. Hours flown on a Microlight will NOT count towards any JAR-FCL revalidation.
2. An NPPL can indeed include Microlight, SLMG and SSEA Class Ratings. Hours flown on any Class will count towards revalidation of all Class Ratings included in an NPPL, although there is a minimum time requirement for each Class. See AIC 30/2008 for full details.
3. If you intend to fly a Microlight in the UK, join the BMAA.