The GOG.com release of these of these two Tex Murphy episodes, is a 27mb downloadable
installer, which installs and runs correctly using a new winxp bottle profile. There
is some sound breakup (more so with Martian Memorandum than Main Streets), but it's
not too severe. This GOG release uses the DosBox engine to run these now 20year old
titles.
Game requires a native 4:3 aspect screenmode of 640x480 (320x200*) to run - for most
of using widescreen 16:10/9 aspect displays, this will means using winecfg to enable
'Emulate a virtual desktop' - see tips&tricks for help on this.
Notes: The Martian Memorandum episode seems to lack a clean exit function - you'll
have to close the wine desktop window to quit the game.
*Display mode is actually a 640x480 dosbox (SDL) viewport - actual game graphics are
320x200 with 2x rescaling.