The REAL Installation movie used to create the hard disk drive for this TAS.
To play this movie, you must first create a Windows 98 hard disk drive as explained on this page
Then, create an XML file with the correct relative file paths to the Windows 98 hard disk drive and game iso. Below is what my XML looks like as an example.
<BizHawk-XMLGame System="DOS" Name="MSBSOLAR-install">
<LoadAssets>
<Asset FileName="..\Windows 98\w98.hdd" />
<Asset FileName=".\MSBSOLAR.iso" />
</LoadAssets>
</BizHawk-XMLGame>
Open this XML file in BizHawk as you would any ROM and play the installation movie. When the movie is finished, export the Windows 98 hard disk drive containing the installed game: DOS > Export Hard Disk Drive... > MSBSOLAR-install.hdd
Then, create another XML file with the correct relative file paths to the Windows 98 hard disk drive containing the installed game and game iso. Below is what my XML looks like as an example.
<BizHawk-XMLGame System="DOS" Name="MSBSOLAR-TAS">
<LoadAssets>
<Asset FileName=".\MSBSOLAR-install.hdd" />
<Asset FileName=".\MSBSOLAR.iso" />
</LoadAssets>
</BizHawk-XMLGame>
Open this XML file in BizHawk as you would any ROM and finally you can play the TAS movie found on the submission page.