part time cpl...
OK, it was a while ago, but......
I did my training as far as CPL/MEp part time almost entirely at weekends (at Stapleford for the CPL and Wycombe for the MEP) - seemed to go well despite some breaks in training of a few weeks at a time.
For the IR I would suggest you try to get it done as quickly as possible - even short breaks in training can leave you feeling rusty when you get back in the air. It may be possible to do part time IR training if you can dedicate weekends and perhaps the odd afternoon or evening during the week but you would need a very understanding school - Cranfield Flight Training, Bonus or Stapleford would be my choices, mainly because of their flexibility.
Enjoy,
Ian.