Hi everyone

I've got a mk3 golf which is the has the GL trim on it. So it's got an Immobilizer & alarm which I believe were factory fitted. The imob / alarm fob on the keys is made by 'Conglog' and so far I haven't been able to make a duplicate made (Any idea's where this can be done?)
Today the imob / alarm fob has started playing up. Sometimes it comes on when pressed, sometimes it doesn't. I wouldn't be so worried, but I can't actually turn the immobilizer off. Without this fob I can't start the engine at all!

This has 4 batteries inside it which are in a plastic tube. I'm not sure if this makes it 1 battery or 4 seperate batteries will actually work. I went to a car shop to try and get some batteries, but they didn't have them in stock. I'm not convinced that 4 batteries will work in this tho :S
Any suggestions? Worse case scenario, how difficult is it to remove the immobilizer?