In the LiveCycle adminstration documentation, there are three different font directories listed.
Adobe Server Fonts Folder This folder is always created wherever LiveCycle is installed (/opt/adobe/livecycle8/fonts/ or C:\Adobe\LiveCycle8\fonts\). Make sure that this folder's contents are copied to all of the horizontal cluster members.
Customer Fonts Folder This folder is usually empty unless your documents or forms require special fonts. (What are the options here ?)
System Fonts Folder Ensure that this folder (whose location is usually predictable for all LiveCycle-supported Operating Systems) is in the same location for all members of a horizontal cluster. In Windows, this is usually C:\Windows\Fonts\. On AIX, this is usually /usr/lpp/X11/lib/X11/fonts/
All Adobe fonts are OTF formats. If we wish to use other fonts that what is installed in the Adobe directory, what are our options ? Are there conversion utilities to use our existing TTF font files ? Is our only option to buy more fonts ? We have strict branding standards here we need to follow.
Why do you believe that you will have problems with other font types?
All Adobe applications do support not only OpenType fonts (both CFF and TrueType flavors), but also Windows TrueType and Windows Type 1 fonts. (The reason why Windows-based Adobe applications cannot support the Mac versions of same is simple - no Windows support for the file system's “resource fork.”)