Dear Neil,
The short answer is that we are working on an installer, which will probably see the light with v6p2 in the summer.
The longer answer is that it has to be multi-platform so TELEMAC can be run on any windows system, any linux flavours, any unix system and including variant of clusters of computers or High Performance Computing resources and all that combined with a variety of fortran compilers.
Despites its current complexity, we are pleased to se that many others are reporting successes of its installation and huuuuge benefits with running it in parallel on small multi-core processors, on small clusters and on super HPC.
Please note that we would welcome help by users and will welcome developments to the system.
Finally, TELEMAC is not only free, it is also open source and remains the mathematically superior suite of solvers.
Looking forward to the day you will think alike.
Sébastien.