I was able to download and install (from Adobe) the Adobe Pagemaker 7.01 trial into Windows 7 Home Premium a few minutes ago, even though it would prefer XP. As this is not the full version, there is a substantial list of functionality not included in this 30 day eval. But, it may be enough to open your document, and save it to either RTF, or Microsoft Open XML (either of which LibreOffice can process). Purportedly, PM 7 can open all older documents.