In the longer run, the file formats used in the ``do-it-yourself'' part are not very robust. The main problem is that with each change of the file format, several pieces of the simulation package need to be adapted consistently. Two ways to improve the situation are (a) use the header line not just for consistency checking, but to obtain the information of the content of each column; (b) use XML (extended markup language). This will be described in the following.