import many posts from text file

Hi, i have a large arhive of information in plain text files, collected long time ago.
In files, articles separated by tag, and in one file it may be thousands.
I need parser or importer engine, when make one post by one article in one category for own file.
But i can’t find that engine. For WP i find just hard way – make a houge WRX file (write xml sturcture by hand) but for this need to write parser. I dont have programer skill on php, but it only way what i see, and probably i must be try to learn basics of php and write parser.
But maybe sombody know more easy way? Maybe somebody see importer, or other blog/cms system have a similar import function? Thanks