https://www.androidfilehost.com/?fid=24391638059058522 this link for the Flamingo, look on the right hand side, pretty much next to the download button shows md5 of 2971edba58dbd97095251d067ecd208a
If you drag and drop the file into the box on that page I linked above, or click the box and navigate where it is saved, wait for the upload to complete and copy & paste the md5 off the download page.
Besides that, I have never used fxp roms as on Sony I was stuck with a locked bootloader. However, reading up I'm afraid it looks like you do have to flash the boot.img using fastboot (ADB) so that is where the problem probably lies if you are trying to just flash it all in TWRP. I'm getting instructions from
https://sites.google.com/site/projectfreexperia/download/howto-install. Just to be sure, is that download definitely for E3? I realise it is following links E3>5.1>Download but when you get that far the on-line file location location says "home/android/
generic device/free xperia". It may be a daft question but I have no experience flashing from these sites, I have always used custom ROMs from XDA with specific instructions for flashing and I'm a little dubious if it is the correct file for the phone. Also, do you have the GAPPS already somewhere? I can't find the link to GAPPs on that page anywhere.
However, if you are sure it is the correct file and you are willing to use ADB (I understand it probably is quite daunting, but it looks like a pretty simple process, just the one real command), we can walk you through it if there is anything you are unsure of.
If you want to go ahead and give it a go, grab the mini sdk from
here.
1. Copy your ROM zip to SD card and
also extract a copy on PC and copy boot.img into your chosen location of where you have saved the sdk tool (I just have mine on C:\mini-SDK).
2. Navigate to your sdk folder, shift and right click on a space in there and select "open command window here"
3. Plug phone in after allowing debugging (type software version several times until developer options is unlocked in screen previous and check in there), now when you connect the phone it should bring up and RSA key and ask you to accept the connection, go ahead and you should now be connected in debug mode.
4. In the cmd window you have open type "adb reboot bootloader" without quotes.
5. Type "fastboot flash boot boot.img"
6. After done type "fastboot reboot"
7. As it's rebooting looks like you should now have FXP logo displayed get into recovery.
8. Select install zip and navigate to your zip you save on the SD in step 1, swipe to flash, then another and select the GAPPs, swipe to flash.
9. Looks like full wipe is necessary (Data & Cache of internal)
10. Reboot and should boot into the new ROM, probably will take a long while for first boot.
This is going off the above guide, I have no experience with these ROMs but as I say I have flashed many things either straight through TWRP/CM or also using ADB, but it's always been with devices using a lot of development for. There are a lot more experienced guys on here that may have used these ROMs / device and have more know how specific to yourself. Good Luck, and remember if you are unsure of anything, just check back first.
