Update: Well I've tried a number of the suggestions in this thread but I've eventually settled on
Download Mage which costs $20 to register, I know I said I wanted freeware but none of the free ones seemed to work particularly well so I've got the next best thing...
So what makes Download Mage good?
* Works with Firebird
* Works silently (i.e. I can press Copy to DLMage in the browser and it starts to queue/download without asking more questions)
* It takes up about 1-3Mb of RAM depending on queue size (Leechget frequently took over 17Mb!)
* Resumes and can follow redirects correctly (for some reason may download managers I've tried get stuck when trying to download off sites which check the referer information)
* I don't come home from work and find the queue
stuck because the remote web server was busy at one point (seems to often be the case with Leechget)
Cheers for all the suggestions though
