Hi there, have you tried some gas drops? Infacol (if you are UK) are good, but have to be given at every feed as have accumulative (sp?) effect, gripe water etc...
Also I used to give my DD tummy massages, also lay her on her back on my legs and bicycle the legs to get wind moving. Have you tried a comfort milk? Cow and Gate do a good one, just called comfort milk, has less lactose in it, and is good for colicky babies. Finally, we switched to Dr Browns bottles which helped (and still do at 7 1/2 months old), expensive and fiddly but worth it. Oh yeah and Colief drops in the milk helped with the colic too, some docs will prescribe
hope this is of some help.