UPDATE 07/10/1012:
Through a series of long winded problems and arguments with various involved parties, I finally managed to get my new terrarium on Thursday. The snake is now settled in it, and temperature and humidity levels are holding steady at an ideal level :3 The snake has taken a feeding in the new enclosure quite happily, and finished his first properly successful (one piece) shed in there as well. Overall he/she seems much, much happier and more comfortable now that there is a suitable enclosure.
Just thought I would update that the problem has now resolved itself! Thank you for your words of support and advice everyone!