Hey guys, I finally got it working. I will post the start to finish down here:
1.Create a new usb via Windows using the Creation tool (I used the stable version in combination with a USB 3.0 Flash drive)
2.Went to Linux (ubuntu in my case) installed the newest version of syslinux on ubuntu (sudo apt install syslinux)
3.Used Make_bootable_linux (might not be needed) (command: Sudo bash make_bootable_linux) Remember to put this in a different folder NOT the USB drive
3.In the BIOS of my Dell R510 i switched the BIOS to BIOS mode, NOT UEFI.
4.Reboot to have this go into effect
5.In the Dell BIOS turned USB flash drive emulation type to Hard disk.
6.Boot from flash drive and everything works now.
I hope this works for you aswell.
EDIT: Typo