Hi Anna,
that would be super, if you were able to give us some data - many thanks! Probably best if you contact us by e-mail at support@ccpn.ac.uk and then once our conference (and possibly also EUROMAR) is over, we can be in touch about all of that.
Given what Gary has written, it looks as though NEF Pipelines might be you best bet for the data conversion. Do take a look at the NEF Pipelines Tutorial at Tutorials - CCPN - Collaborative Computing Project for NMR to find out how to install this - the code is included in the latest version of CcpNmr Analysis and I found it fairly straight forward to install and update.
The development version of ARIA is NEF compatible (and @bardiaux is usually happy to give this people who request it from him) - but that may not work well with your in-house adapted version.
Vicky