If it's a sound library, you can follow guides on How to add Soundfonts to FL Studio.
A .rar file is a compressed archive. To access its contents (likely comic scans in PDF, CBR, or CBZ format), you need an extraction tool: Use 7-Zip or WinRAR . For Mobile: Use apps like RAR or ZArchiver . for tintin(1).rar
A popular and lightweight comic book reader. If it's a sound library, you can follow