Note: this applies to the Europress UK release at least. Not sure if it'll work for the US SegaSoft version.

1. Make a folder on your PC to install the game to, e.g. c:\games\planecrazy
2. Open CD-ROM
2. Open the "Plane Crazy" folder
3. Copy the "Data" folder into your install folder, e.g. c:\games\planecrazy
4. On the CD-ROM, open the folder of the language you wish to install (e.g. "English")
5. Copy the "Local" folder into the Data\DataMin folder on your PC, e.g. c:\games\planecrazy\Data\DataMin
6. In the PC folder, go back up to the root planecrazy folder, e.g. c:\games\planecrazy\
7. On the CD-ROM, copy these files from the language folder that's already open, to the PC folder: chubsc.ico, IFORCE2.dll, PCrazy.exe, pcrazy.ini, Readme.txt
8. Download the 1.1 patch (e.g. from http://www.patches-scrolls.de/patch/3166). The patch zip file should contain 3 items, a "data" folder, changes.txt and pcrazy.exe, copy all 3 into your PC folder, e.g. c:\games\planecrazy and overwrite as necessary
9. Create a text file and enter the following into it. IMPORTANT: if you're installing to a non-64 bit system, remove the parts that say "\Wow6432Node". Also: change the paths to reflect where you installed the game, if it's not in c:\games\planecrazy (but remember to keep the double \\'s). One more thing: change the "sNotBovine" value to the letter your CD is installed in, or the game will fail the CD check:

1Windows Registry Editor Version 5.00
2
3[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Europress\Plane Crazy]
4
5[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Europress\Plane Crazy\1.0]
6"language"=dword:00000001
7"Installed"=dword:00000001
8"sPath_DataMin"="c:\\games\\planecrazy\\data\\datamin"
9"sPath_DataMax"="c:\\games\\planecrazy\\data\\datamax"
10"sNotBovine"="E:"

Save it as planecrazy.reg somewhere. Locate this planecrazy.reg file and double-click it to install the registry strings.

10. Go back to the PC folder and double-click PCrazy.exe to run. It should work now (you can right-click drag a shortcut to this if you wish).

NOTE: the game options window lists resolutions above 1024x768, but if you select them the game will switch back to 640x480, as it doesn't support them. Also, the game runs full screen with a border, so use a program like BorderlessGaming (applied to Pcrazy.exe) - if you then run with a resolution above 640x480 (i.e. 800x600 or 1024x768) then the border should disappear.