Open Office will open Wordpad files without any difficulties. By default, Wordpad saves documents as 'rich text format' (.rtf) - you can specify different formats if you choose. OpenOffice will read rtf files without any problems.
Just open it as if it was an OpenOffice document. OpenOffice will read MS Works documents quite happily, and you can either save them as OpenOffice or MS Works formats.
It's an integrated 'suite' of programs incorporating word-processing, spreadsheet, database and presentation programs. It's 'purpose' is to make better use of the users time - by being able to...
Either open an existing document or a new one - select Format, then Page, then at the Orientation option - check the Landscape option. Click OK, and you're done.