As by \"opener\" you mean another program, most likely yes.

Windows systems have Word and that can handle large documents.

You can always open another text viewer/editor and try to open the file in that program.

If you do find a program that could open those files, you might want that program to always open that file type. (Because if you had one file that had a problem, you can bet later on you will find others like it in the future.) In that case, and you are running Windows XP (or maybe even 98... I forgot how it looks in 98.), you can change what programs opens what. It took me a while to figure it out but here it goes. You go to the toolbar up in the top of any folder and click on \"Tools\". Now click on \"Folder Options\". It should give you another window. Click on the \"File Types\" tab. It will start finding all the file extensions and what programs open them. Once it gives you a list, find the file extension that the document, that you want to open, is. Usually if it is a text document, you can easily change the program that opens that type of file by clicking on \"Change\". Change the program to another program that can use those file types.

I hope... that helped? ;;^^